One of the largest beds in the sky is set to debut in just a few months time when JetBlue starts flying its A321neos from Boston and New York to London. JetBlue's new Mint Studio offering consists of two mini-rooms at the front of its newest planes, each with a comfortable seat that turns into its own fully flat bed behind a privacy door with an adjoining sofa that, with the seat, converts to one of the largest beds in the air. Behind those come 22 Mint Suites, minus the adjoining sofa.